Six years of war in Syria have blighted countless lives and now Lionel Messi has opened up on his sadness at the situation.The Barcelona forward used his Facebook page to raise awareness of UNICEF`s humanitarian campaign in the country."A war day is too much," he wrote."The children of Syria have been subjected to violence and cruelty for SIX years in a conflict that holds them hostage. "As a father and as a UNICEF`s Ambassador I am heartbroken. Add your voice to UNICEF to demand the end of the war."Source: Marca